CN114337132A - Bearing protection method for large motor transportation - Google Patents
Bearing protection method for large motor transportation Download PDFInfo
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- CN114337132A CN114337132A CN202210038488.1A CN202210038488A CN114337132A CN 114337132 A CN114337132 A CN 114337132A CN 202210038488 A CN202210038488 A CN 202210038488A CN 114337132 A CN114337132 A CN 114337132A
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000000523 sample Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a bearing protection method for large motor transportation, which comprises the following steps: fixing a bearing outer cover on a motor bearing seat to enable the bearing outer cover to tightly press an outer ring of a bearing, wherein a boss of the bearing outer cover is circumferentially provided with a radial thread through hole; secondly, fixedly arranging the outer oil seal on the rotating shaft, tightly pressing the inner ring of the bearing by the outer oil seal, and sleeving the boss on the outer side of the outer oil seal; and thirdly, screwing a locking bolt into the radial threaded through hole, wherein the end face of the locking bolt is abutted against the outer surface of the outer oil seal, so that the bearing and the rotating shaft are relatively fixed. Compared with the prior art, the bearing protection method for large motor transportation provided by the invention has the advantages of simple structure and low cost, can protect the bearing from being damaged in the transportation process, and is more reliable.
Description
Technical Field
The application relates to the technical field of motor bearings, in particular to a bearing protection method for large motor transportation.
Background
The bearing is a key part for supporting the operation of the motor, and the condition of the bearing directly determines the application reliability of the motor. After the motor assembly is finished and the delivery operation test is qualified, the single motor is often sent to a customer assembly base and is assembled and debugged with the whole machine part, and the abnormal sound phenomenon of a bearing of part of the motor is often found in the operation and debugging process. Through reason analysis, the bearing transportation damage is often caused by improper transportation protection and fixing of the generator, and the bearing damage is aggravated by overlarge vibration caused by uneven road surface, rapid acceleration and deceleration and the like.
In the prior art, bearing protection for motor transportation generally eliminates bearing play through a shaft end protection tool, axial fixing is realized by utilizing axial pressing force, the protection method has obvious effect when two ends of a motor are both configured with ball bearings, but in a large motor, the bearing configuration of the motor usually adopts a mode that one end of the bearing is a ball bearing, the other end of the bearing is a column bearing, the two ends of the bearing are both column bearings or one end of the bearing is a column bearing, and the other end of the bearing is a ball bearing and a column bearing. After the bearing is damaged, mechanical vibration and mechanical noise are increased during operation, the quality of the motor is reduced slightly, and the motor cannot normally operate or even cannot be used seriously.
Often adopt belt or rope tensioning bearing to fix the bearing among the prior art to the post bearing protection, because the elasticity of belt and rope is great, and the unable accurate quantization of applied straining force to lead to the device not good in the result of use in large-scale motor, can't restrain the radial float of rotor.
Therefore, a bearing protection method for large motor transportation is urgently needed, has a simple structure and low cost, can protect the bearing from being damaged in the transportation process, and is more reliable.
Disclosure of Invention
In order to solve the technical problem, the application provides a bearing protection method for large motor transportation, which is simple in structure, low in cost, and more reliable and can protect the bearing from being damaged in the transportation process.
The technical scheme provided by the application is as follows:
a bearing protection method for large motor transportation comprises the following steps:
fixing a bearing outer cover on a motor bearing seat to enable the bearing outer cover to tightly press an outer ring of a bearing, wherein a boss of the bearing outer cover is circumferentially provided with a radial thread through hole;
secondly, fixedly arranging the outer oil seal on the rotating shaft, tightly pressing the inner ring of the bearing by the outer oil seal, and sleeving the boss on the outer side of the outer oil seal;
and thirdly, screwing a locking bolt into the radial threaded through hole, wherein the end face of the locking bolt is abutted against the outer surface of the outer oil seal, so that the bearing and the rotating shaft are relatively fixed.
Preferably, the bearing arrangement of the motor comprises a ball bearing, and between step two and step three, the following steps are further included:
and applying axial pretightening force to the end surface of the rotating shaft through the pre-compacting device to eliminate the installation clearance of the ball bearing.
Preferably, after the third step, the following steps are further included:
and step four, dismantling the pre-pressing device and transporting the motor.
Preferably, the pre-compaction device comprises:
the pressing plate is arranged on one side of the motor and is abutted against the rotating shaft;
the jacking screw rod penetrates through the pressing plate and is abutted to one side, away from the motor bearing seat, of the bearing outer cover, and a mounting nut located on the outer side of the pressing plate is arranged on the jacking screw rod.
Preferably, the locking bolts are provided with a plurality of groups, and the locking bolts are arranged at intervals around the circumference of the outer oil seal.
Preferably, the radial threaded through hole is provided at one side of the rotating shaft, and resultant forces of the respective lock bolts to the outer oil seal are in the same direction.
Preferably, the locking bolts are uniformly arranged around the circumference of the outer oil seal at intervals, and each locking bolt penetrates through the radial threaded through hole to abut against the outer surface of the outer oil seal.
Preferably, after the step two, the following steps are further included:
mounting a dial indicator on the bearing outer cover, and enabling a probe of the dial indicator to be in contact with the rotating shaft to obtain an initial value of the dial indicator;
slowly hoisting one end of the rotating shaft by a hoisting device until the numerical value of the dial indicator is not changed any more, and obtaining the measured value of the dial indicator;
the difference between the initial value and the measured value is the radial mounting play between the rotating shaft and the bearing.
Preferably, the third step specifically comprises:
and screwing each locking bolt until the display value of the dial indicator is between the initial value and the measured value, and at the moment, the end surfaces of the locking bolts are abutted against the outer surface of the outer oil seal.
Preferably, the surface of the outer oil seal contacting the lock bolt is a flat surface.
The invention provides a bearing protection method for large motor transportation, which comprises the following steps: fixing the outer bearing cover on the motor bearing seat, so that the outer bearing cover presses the outer ring of the bearing tightly to axially position the outer ring of the bearing; fixedly arranging an outer oil seal on the rotating shaft, so that the outer oil seal presses an inner ring of the bearing tightly, and the inner ring of the bearing is axially positioned; the side, away from the motor bearing seat, of the outer bearing cover is provided with a boss, after the outer bearing cover and the outer oil seal are installed, the boss is sleeved on the outer side of the outer oil seal, a radial thread through hole is formed in the circumferential direction of the boss, a locking bolt is screwed into the radial thread through hole, the end face of the locking bolt is abutted to the outer surface of the outer oil seal, the bearing is fixed with the rotating shaft, the radial installation clearance between the rotating shaft and the bearing is eliminated by utilizing the abutting action of the locking bolt on the outer oil seal, and the rotating shaft is fixedly connected with the outer oil seal, so that the bearing is prevented from being damaged due to play in the radial direction of the rotating shaft in the transportation process; because the locking bolt and the outer oil seal have mutual friction and friction torque to fix the rotating shaft, the rotating shaft is prevented from generating axial float and circumferential rotation, and therefore effective fixation in three directions of the rotating shaft is achieved.
Secondly, because the connection that the locking bolt precession is between the radial screw thread through-hole is rigid connection, the connection between the two is more reliable, guarantees that the bearing can not appear false brinell indentation damage under the continuous high frequency vibration impact in the motor transportation yet.
And thirdly, as the self parts of the motor are utilized, the outer oil seal and the outer bearing cover are locked only by the locking bolt penetrating through the radial thread through hole on the outer bearing cover, the structure is simple, and the cost is low.
Therefore, compared with the prior art, the bearing protection method for large motor transportation in the embodiment of the invention has the advantages of simple structure, low cost, capability of preventing the bearing from being damaged and higher reliability.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a bearing protection tool for transporting a large-scale motor according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is another schematic structural diagram of a bearing protection tool for transporting a large-scale motor according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating an embodiment of fixing an outer oil seal to a bearing outer cover according to the present invention;
FIG. 5 is a partial enlarged view of the portion B in FIG. 4;
fig. 6 is a schematic structural diagram of a hoisting device according to an embodiment of the present invention.
Reference numerals: 1. a bearing outer cover; 2. a motor bearing seat; 3. a bearing; 4. an outer oil seal; 5. a rotating shaft; 6. locking the bolt; 7. a pre-compaction device; 71. pressing a plate; 72. tightly pushing the screw; 73. mounting a nut; 81. a dial indicator; 82. a probe; 83. a hoisting device; 84. an electronic scale.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
Embodiments of the present invention are written in a progressive manner.
Referring to fig. 1 to 2, an embodiment of the present invention provides a method for protecting a bearing used for transporting a large motor, including the following steps: fixing a bearing outer cover 1 on a motor bearing seat 2, enabling the bearing outer cover 1 to press an outer ring of a bearing 3, and arranging a radial thread through hole in the circumferential direction of a boss of the bearing outer cover 1; step two, the outer oil seal 4 is sleeved on the rotating shaft 5, so that the outer oil seal 4 presses the inner ring of the bearing 3, and the boss is sleeved on the outer side of the outer oil seal 4; and thirdly, screwing the locking bolt 6 into the radial threaded through hole, and enabling the end face of the locking bolt 6 to be abutted against the outer surface of the outer oil seal 4, so that the bearing 3 and the rotating shaft 5 are relatively fixed.
The column bearing of the motor among the prior art generally adopts belt or the taut bearing of rope to fix the bearing at the in-process of transportation, because the elasticity of belt and rope is great, and the unable accurate quantization of applied tension to lead to the result of use effect of the device in large-scale motor not good, can't restrain the radial drunkenness of rotor.
The invention provides a bearing protection method for large motor transportation, which comprises the following steps: fixing the bearing outer cover 1 on the motor bearing seat 2, so that the bearing outer cover 1 presses the outer ring of the bearing 3 to axially position the outer ring of the bearing 3; fixedly arranging the outer oil seal 4 on the rotating shaft 5, so that the outer oil seal 4 presses the inner ring of the bearing 3 to axially position the inner ring of the bearing 3; a boss is arranged on one side, away from the motor bearing seat 2, of the bearing outer cover 1, after the bearing outer cover 1 and the outer oil seal 4 are installed, the boss is sleeved on the outer side of the outer oil seal 4, a radial thread through hole is formed in the circumferential direction of the boss, a locking bolt 6 is screwed into the radial thread through hole, the end face of the locking bolt 6 is abutted against the outer surface of the outer oil seal 4, the bearing 3 and the rotating shaft 5 are relatively fixed, the radial installation clearance between the rotating shaft 5 and the bearing 3 is eliminated by utilizing the abutting effect of the locking bolt 6 on the outer oil seal 4, and the bearing is prevented from being damaged due to play in the radial direction of the rotating shaft 5 in the transportation process; because mutual friction force and friction torque exist between the locking bolt 6 and the outer oil seal 4 to fix the rotating shaft 5, the axial direction movement and the circumferential direction rotation movement between the rotating shaft 5 and the bearing 3 are prevented, and the effective fixation of the rotating shaft 5 in three directions is realized.
Secondly, because the connection that locking bolt 6 screwed in between the radial screw thread through-hole is rigid connection, the connection between the two is more reliable, guarantees that the bearing can not appear false brinell indentation damage under the continuous high frequency vibration impact in the motor transportation yet.
Thirdly, because the self parts of the motor are utilized in the invention, the outer oil seal 4 is locked only by the locking bolt 6 penetrating through the radial thread through hole on the bearing outer cover 1, the structure is simple, and the cost is low.
In summary, compared with the prior art, the bearing protection method for large motor transportation in the embodiment of the invention has the advantages of simple structure, low cost, capability of preventing the bearing from being damaged and higher reliability.
In the above method, if the bearing arrangement of the motor is specifically: as a more preferable embodiment, the method for protecting a bearing for transporting a large-sized motor in an embodiment of the present invention includes: and mounting the motor at the transmission end according to the steps from one to three, and mounting the motor at the non-transmission end according to the steps from one to three. The bearing 3 at the two ends can not be damaged under the continuous high-frequency vibration impact in the motor transportation process.
In the above method, if the bearing arrangement of the motor includes a ball bearing, as shown in fig. 3, the following steps are further included between step two and step three: axial pretightening force is applied to the end face of the rotating shaft 5 through the pre-tightening device 7, the rotating shaft 5 is tightly pressed through the axial pretightening force, axial installation clearance between the ball bearing and the rotating shaft 5 is eliminated, the locking bolt 6 is screwed into the radial threaded through hole under the action of the pretightening force, so that the end face of the locking bolt 6 is abutted against the outer surface of the outer oil seal 4, the radial installation clearance between the rotating shaft 5 and the bearing is eliminated, and due to the fact that mutual friction force and friction torque exist between the locking bolt 6 and the outer oil seal 4, axial direction play and circumferential direction rotation motion between the rotating shaft 5 and the bearing 3 are prevented, and effective fixation of the rotating shaft 5 in three directions is achieved.
Further, in the above method, the bearing arrangement of the motor is specifically: one end of the motor is provided with a ball bearing, and the other end of the motor is provided with a column bearing; or, a ball bearing and a column bearing are arranged at one end of the motor, and a column bearing is arranged at the other end of the motor. The bearing arrangement condition of the motor can be set according to the actual use condition.
In the above method, as a more preferred embodiment, the method for protecting a bearing for transporting a large motor in the embodiment of the present invention further includes, after step three, the following steps: and (5) removing the pre-compression device 7 and transporting the motor. In the pre-pressing device 7, the locking bolt 6 is screwed into the radial thread through hole to apply axial pre-tightening force to the end face of the rotating shaft 5, the pre-pressing device 7 can be detached after the locking bolt 6 is installed, and the transportation process is more convenient.
In the above method, the pre-compression device 7 in the embodiment of the present invention includes a pressing plate 71, a tightening screw 72, and a mounting nut 73, where the pressing plate 71 is disposed on one side of the motor and abuts against the rotating shaft 5, the tightening screw 72 passes through the pressing plate 71 and abuts against one side of the bearing outer cover 1 away from the motor bearing seat 2, the mounting nut 73 is disposed on the tightening screw 72, the mounting nut 73 is located on the outer side of the pressing plate 71, a pre-compression force is applied to the rotating shaft 5 through the pressing plate 71, and the pre-compression force can be accurately quantified through a tightening torque.
In the above method, the pre-press device 7 in the embodiment of the present invention is not limited to the above embodiment, and the pre-press device 7 in the embodiment of the present invention may be: and an oil cylinder or an air cylinder for applying pretightening force to the end surface of the rotating shaft 5.
In the above method, the locking bolt 6 in the embodiment of the present invention is provided with at least one set, and when the locking bolt 6 is provided with only one set, the radial installation play between the bearing 3 and the rotating shaft 5 is eliminated by the abutment of the end surface of the locking bolt 6 with the outer surface of the outer oil seal 4 under the abutment force of the locking bolt 6.
When the lock bolt 6 is provided as a set, two embodiments of the lock bolt 6 may be provided, and as an embodiment, the lock bolt 6 in the embodiment of the present application is provided above the rotating shaft 5, and the end surface of the lock bolt 6 abuts against the upper surface of the outer oil seal 4. As another embodiment, the lock bolt 6 in the embodiment of the present invention is provided below the outer oil seal 4, and the end surface of the lock bolt 6 abuts against the lower surface of the outer oil seal 4. In the above two methods, as a more preferable embodiment, the locking bolt 6 in the embodiment of the present invention is disposed above the rotating shaft 5, and when the locking bolt 6 is disposed above the rotating shaft 5, the radial acting force applied to the locking bolt 6 is smaller and the reliability is higher than when the locking bolt 6 is disposed below the rotating shaft 5.
In the above method, the locking bolts 6 in the embodiment of the present invention may be provided in plural sets, the locking bolts 6 are arranged at intervals around the circumferential direction of the outer oil seal 4, and the radial installation play of the bearing 3 is eliminated by the plural sets of locking bolts 6.
In the method, the locking bolt 6 is arranged in two modes around the circumference of the outer oil seal 4, as one mode, the radial thread through hole in the embodiment of the invention is arranged at one side of the rotating shaft 5, the locking bolt 6 penetrates through the radial thread through hole to abut against the outer surface of the outer oil seal 4, the resultant force of the acting force of each locking bolt 6 on the outer oil seal 4 is in the same direction, and the radial installation clearance of the bearing 3 is eliminated through a plurality of groups of locking bolts 6, so that the rotating shaft cannot generate relative play in the transportation process, and the bearing cannot be damaged.
As another embodiment, please refer to fig. 4 and 5, in the embodiment of the present invention, a plurality of sets of locking bolts 6 are provided, and the locking bolts are uniformly spaced around the circumference of the outer oil seal 4, each locking bolt passes through the radial threaded through hole to abut against the outer surface of the outer oil seal 4, the resultant force of each locking bolt 6 is equal to the gravity of the rotating shaft and has an opposite direction, the rotating shaft 5 is fixed by the locking bolt 6, at this time, the rotating shaft, the inner ring of the bearing and the outer ring of the bearing are relatively fixed, the rotating shaft and the inner ring of the bearing are fixed in the outer ring of the bearing in a floating manner, and the rotating shaft 5 does not move in the radial direction during transportation, thereby avoiding damage to the bearing.
In the above method, as shown in fig. 6, as a more preferable embodiment, in order to determine that the rotating shaft 5 is fixed in the bearing 3, the method further includes the following steps between step two and step three in the embodiment of the present invention: installing the dial indicator 1 on the outer cover, and enabling the probe 82 of the dial indicator 1 to be in contact with the rotating shaft 5 to obtain an initial value of the probe 82 of the dial indicator 1; hoisting one end of the rotating shaft 5 by the hoisting device 83 until the numerical value displayed by the dial indicator does not change any more, and obtaining the measured value of the probe 82 of the dial indicator 1; the difference between the measured value and the initial value is the mounting play between the bearing 3 and the rotating shaft 5.
In the above method, the lifting device in the embodiment of the present invention is provided with an electronic scale 84 for preventing the lifting device 83 from lifting the motor.
In the above method, the third step in the method for protecting a bearing for transporting a large motor in the embodiment of the present invention is specifically: and (3) screwing each locking bolt 6 until the probe 82 of the dial indicator 1 is positioned between the initial value and the measured value, and at the moment, the end surface of each locking bolt 6 is contacted with the outer surface of the outer oil seal 4. At the moment, the rotating shaft is fixed through the locking bolts, so that the radial play of the rotating shaft is avoided, and the bearing is prevented from being damaged.
In order to facilitate the operation, in the above method, after the step "make the probe 82 of the dial indicator 1 contact the rotating shaft 5" and before the step "lift one end of the rotating shaft 5 by the hoisting device 83", the dial indicator 1 is reset to zero, at this time, the initial value of the probe 82 of the dial indicator 1 is zero, the installation backlash is the measured value of the probe 82 of the dial indicator 1, and the operation is more convenient.
In the above method, as a more preferable embodiment, in the embodiment of the present invention, "tightening each locking bolt 6 until the probe 82 of the dial indicator 1 is located between the initial value and the measured value" specifically includes: each locking bolt 6 is tightened until the display value of the dial gauge 1 is half of the measured value.
In the above method, as a more preferable embodiment, the surface of the outer oil seal 4 contacting the lock bolt 6 in the embodiment of the present invention is a flat surface. The contact area between the locking bolt 6 and the outer oil seal 4 is increased, the friction force between the locking bolt 6 and the outer oil seal 4 is increased, the rolling body of the bearing can be effectively fixed, and the fixing effect is more reliable.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A bearing protection method for large motor transportation is characterized by comprising the following steps:
fixing a bearing outer cover (1) on a motor bearing seat (2) to enable the bearing outer cover (1) to press an outer ring of a bearing (3), wherein a boss of the bearing outer cover (1) is circumferentially provided with a radial thread through hole;
secondly, fixedly arranging the outer oil seal (4) on a rotating shaft (5), tightly pressing an inner ring of the bearing (3) by the outer oil seal (4), and sleeving the boss on the outer side of the outer oil seal (4);
and thirdly, screwing a locking bolt (6) into the radial thread through hole, wherein the end face of the locking bolt (6) is abutted against the outer surface of the outer oil seal (4), so that the bearing (3) and the rotating shaft (5) are relatively fixed.
2. The method for protecting a bearing for transportation of a large motor according to claim 1,
the bearing arrangement structure of the motor comprises a ball bearing, and further comprises the following steps between the second step and the third step:
and applying axial pretightening force to the end surface of the rotating shaft (5) through a pre-pressing device (7) to eliminate the installation clearance of the ball bearing.
3. The method for protecting the bearing for the transportation of the large motor according to claim 2, further comprising the following steps after the third step:
and step four, dismantling the pre-pressing device (7) and transporting the motor.
4. The method for protecting a bearing for large motor transportation according to claim 2,
-said pre-compacting device (7) comprising:
the pressing plate (71) is arranged on one side of the motor and is abutted against the rotating shaft (5);
the pressing plate (71) penetrates through the pressing plate, the jacking screw rod (72) is abutted to one side, away from the motor bearing seat (2), of the bearing outer cover (1), and a mounting nut (73) located on the outer side of the pressing plate (71) is arranged on the jacking screw rod (72).
5. The method for protecting a bearing for large motor transportation according to any one of claims 1 to 4,
the locking bolts (6) are provided with a plurality of groups, and the locking bolts (6) are arranged around the outer oil seal (4) at intervals in the circumferential direction.
6. The method for protecting a bearing for transportation of a large motor according to claim 5,
the radial thread through holes are formed in one side of the rotating shaft (5), and the resultant force of the locking bolts (6) to the outer oil seal (4) is in the same direction.
7. The method for protecting a bearing for transportation of a large motor according to claim 5,
the locking bolts are uniformly arranged around the circumference of the outer oil seal (4) at intervals, and each locking bolt (6) penetrates through the radial thread through hole to be abutted against the outer surface of the outer oil seal (4).
8. The method for protecting a bearing for transportation of a large motor according to claim 7,
after the second step, the following steps are also included:
mounting a dial indicator (81) on the outer bearing cover (1), and enabling a probe (82) of the dial indicator (81) to be in contact with the rotating shaft (5) to obtain an initial value of the dial indicator (81);
slowly hoisting one end of the rotating shaft (5) by using a hoisting device (83) until the numerical value of the dial indicator (81) does not change any more, and obtaining a measured value of the dial indicator (81);
the difference between the initial value and the measured value is the radial mounting play between the shaft (5) and the bearing (3).
9. The method for protecting a bearing for transportation of a large motor according to claim 8,
the third step is specifically as follows:
and screwing each locking bolt (6) until the display value of the dial indicator (81) is between the initial value and the measured value, and at the moment, the end face of each locking bolt (6) is abutted against the outer surface of the outer oil seal (4).
10. The bearing protection method for large motor transportation according to any one of claims 1 to 4, 6 to 9,
the surface of the outer oil seal (4) contacted with the locking bolt (6) is a plane.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038488.1A CN114337132B (en) | 2022-01-13 | 2022-01-13 | Bearing protection method for large-scale motor transportation |
| PCT/CN2022/143605 WO2023134464A1 (en) | 2022-01-13 | 2022-12-29 | Bearing protection method in transportation of large-scale motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038488.1A CN114337132B (en) | 2022-01-13 | 2022-01-13 | Bearing protection method for large-scale motor transportation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114337132A true CN114337132A (en) | 2022-04-12 |
| CN114337132B CN114337132B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210038488.1A Active CN114337132B (en) | 2022-01-13 | 2022-01-13 | Bearing protection method for large-scale motor transportation |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114337132B (en) |
| WO (1) | WO2023134464A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059693A (en) * | 2022-06-30 | 2022-09-16 | 江苏中车电机有限公司 | Motor transportation bearing protection method |
| WO2023134464A1 (en) * | 2022-01-13 | 2023-07-20 | 中车株洲电机有限公司 | Bearing protection method in transportation of large-scale motor |
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| CN112713726A (en) * | 2020-12-25 | 2021-04-27 | 中车永济电机有限公司 | Traction motor bearing transportation protection tool with shaft extension |
| CN213305169U (en) * | 2020-09-24 | 2021-05-28 | 宁夏西北骏马电机制造股份有限公司 | Motor shaft capable of preventing rotation and channeling |
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| CN202384937U (en) * | 2011-11-17 | 2012-08-15 | 南车成都机车车辆有限公司 | Motor rotor locking mechanism |
| CN103607065B (en) * | 2013-11-25 | 2016-02-03 | 南车株洲电机有限公司 | The manufacture method of bearing insulation device, bearing insulation device, and variable-frequency motor |
| CN111669020B (en) * | 2020-06-22 | 2021-09-24 | 中车株洲电机有限公司 | Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled |
| CN111687786A (en) * | 2020-06-22 | 2020-09-22 | 中车株洲电机有限公司 | Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled |
| CN114337132B (en) * | 2022-01-13 | 2024-04-26 | 中车株洲电机有限公司 | Bearing protection method for large-scale motor transportation |
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- 2022-01-13 CN CN202210038488.1A patent/CN114337132B/en active Active
- 2022-12-29 WO PCT/CN2022/143605 patent/WO2023134464A1/en unknown
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| US4309062A (en) * | 1979-09-21 | 1982-01-05 | Emerson Electric Co. | Bearing movement preventing system |
| CN203082048U (en) * | 2012-12-20 | 2013-07-24 | 比亚迪股份有限公司 | Bearing clearance controllable installation device |
| CN103884259A (en) * | 2014-04-08 | 2014-06-25 | 湖南南方宇航高精传动有限公司 | Bearing play measuring device |
| CN206422662U (en) * | 2017-02-15 | 2017-08-18 | 中车株洲电机有限公司 | A kind of motor |
| CN213305169U (en) * | 2020-09-24 | 2021-05-28 | 宁夏西北骏马电机制造股份有限公司 | Motor shaft capable of preventing rotation and channeling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023134464A1 (en) * | 2022-01-13 | 2023-07-20 | 中车株洲电机有限公司 | Bearing protection method in transportation of large-scale motor |
| CN115059693A (en) * | 2022-06-30 | 2022-09-16 | 江苏中车电机有限公司 | Motor transportation bearing protection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114337132B (en) | 2024-04-26 |
| WO2023134464A1 (en) | 2023-07-20 |
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